§ 39-54. Filtration system generally.

(a)

The recirculation system shall be equipped with a filtration system that will filter the entire content of a I [inlet] within six (6) hours or less at the rate of three (3) gallons or less per square foot of filter area for rapid sand filter and twenty (20) gallons or less per square foot of filter area for high-rate sand filters. Pressure filters shall be equipped with readily accessible air relief valves and with an access hole large enough to permit inspections, maintenance and repair work. Each pressure filter system shall be equipped with a pressure gauge, at least four (4) inches in diameter, on the inlet and outlet (unless the system is designed for one (1) gauge and is approved by the National Sanitarian Foundation or equivalent), to indicate the pressure in pounds per square inch; and a sight glass that can be easily removed for cleaning shall be provided on the waste discharge line. Gravity type filters shall be equipped with loss-of-head gauges.

(b)

The filtration rate for diatomaceous earth filters and similar equipment may not exceed one and one-half (1½) gallons per square foot of filter area with six (6) hours' turnover of pool volume, unless continuous slurry feed is provided, in which case the rate shall not exceed three (3) gallons per square foot of filter area.

(c)

Arrangements of equipment shall be provided for application of filter aid and proper precoating and cleaning of filter elements. All filters shall be so designed and capable of being cleaned or backwashed by use of the washwater pump and the manipulation of valves. In view of the constant change of design of such equipment, it will be necessary to evaluate each system individually and approval or rejection will be at the discretion of the health officer, based upon the need for protecting the health and safety of those using the pool.

(Ord. No. 4739-95)

(Ord. No. 4739-95)